Lapa dos Brejões

Lapa dos Brejões is a complex of caverns formed in Neoproterozoic limestones of the Una Group of caves (Salitre formation) along the Jacaré river, northeast side of the Irecê sedimentary basin.

It is located in the northern portion of the Chapada Diamantina - Polígono das Secas, in the north central part of the State of Bahia, about 500 km (310 mi) from the capital Salvador, Brazil.

[1] Lapa dos Brejões is one of the most remarkable group of caves in Brazil by the large amplitude of its galleries, halls, skylights, speleothems and its main entrance portico with 106 meters (348 ft) in height.

It is the main part with 6,570 meters (21,560 ft) of large galleries where the speleothems and the most striking morphological features are concentrated, including two giant collapsed dolines as skylights.

Their features are cylindrical with their base wider than the top that reach 100 meters (330 ft) in diameter, occupied by large piles of blocks of rock and huge pillars anchored to the walls.